Hard to tell from the skewed picture, but it does look like one porch
pier settled, or the other one (with the failed stucco) has
frost-heaved. Need to stare at it awhile in person, and make use of a
4-foot level, maybe a water level, and some big marbles, to figure out
what is going on. Porch may need jacking on one corner, and a pier
rebuilt or shimmed, depending on condition.
--
aem sends...

Well I see it clearly. The right front top is to the right of the
right rear top.
And the center front post leans a little relative to the door frame.
I have very little experience, but I'm not sure how a bad pier would
cause this. But what do I know.
I would measure it carefully and precisely and check every year or 6
months to make sure it's not getting worse. I'd measure dimensions
and the verticality of the posts. I'm not sure which would show a
change first, but I'd try to measure as many things as I could in a
reasonable amount of time.

yur right... I don't think a bad pier would cause this.... I don't
know how long this thing has been leaning... it's a recent
discovery... however, it has to be corrected and i'm still in the
dark...
there's a giant tree just to the left and I'm tempted to tie a belt to
it and to the far end of the porch pillar and tighten till it's 2
inches on plumb..... mebby I'm simplyfying this a tad.... but I think
it'll work... with some shims stuck in of course...... but what do I
know.... I'm just a phone man....

And you'll leave it that way? That might work. I thought of putting
a cable and turnbuckle in from the left top rear to the top front
right, and from the left front bottom to the top front right, but a) I
don't know who to attach them well enough to actually pull hard
enough, b) they would be ugly when left in place, c) if you wanted to
remove them, I don't know how to keep the porch from going back the
way it was (short of doing something triple ugly, much worse than a
cable from a tree.).
The tree sounds better, if you have to fix this. I would do
measurements as soon as possible. If you see changes in 2 months or
by October, you'll think harder.

My guess is that the roofer leaned a ladder on the left side when all
the sheathing was off. I think you'll do nothing good by trying to
rack it back by brute force.
Do you have pictures of the roofing job- or before?
But I might throw a rope around the roof and tree and see how much it
takes to wiggle the thing-- and if it goes back to its current
position when pressure is released. [I'm talking fractions of an
inch]
If I'm right- then leave it alone until you replace the roof- and
re-do the sheathing.
And if it really bothers you- just re-box the posts with plumb boxes.
I don't think there is enough problem there to create a dangerous
situation. [*if* I'm right- that it is just racked to the right but
the lumber is in good condition]
Jim

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